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Traffic heat map of Kittitas County, Washington: 581 miles of roads shaded from blue (light) to red (heavy traffic), busiest on I 90 and East University

Kittitas County, Washington Traffic Counts

Traffic analytics for Kittitas County, Washington, calculated from real-world mobile and sensor networks on 5,564 road segments (581 road miles, about 551 ft each). Its highways carry one of the top 3 truck shares of any county in Washington. Use the figures below to move from assumptions to certainty on retail locations, logistics and road planning.
Data sourced from TrafficZoom's proprietary analytics platform.
Data current as of:
Q3 2026
Updated:
September 29, 2026
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total traffic icon

Total Traffic Volume & Performance in Kittitas County, Washington

Traffic

The average number of vehicles that travel each day over any road in the road network.

vehicles per day3,711
Trucks

The percentage of the total traffic volume composed of heavy vehicles.

16.3%
Average travel time

The average time of travel averaged among all vehicles traveling on the road network.

34.5 min
Congestion ratio

The rate at which the actual travel time exceeds free-flow travel time, averaged among all roads in the network.

13.7%
Drivers’ average age

Average age of residents in the geographic areas where the vehicle trips originated.

45.2 yrs
Drivers’ average income

Average income of residents in the geographic areas where the vehicle trips originated.

$89,588

The average monitored road in Kittitas County, Washington carries 3,711 vehicles per day. Across its 581 miles of monitored roads, that adds up to 3,473,823 vehicle-miles traveled per day (≈1.3 billion per year). About 1 in 6 vehicles is a truck, well above the 7.1% across Washington - a freight-heavy mix.

Traffic 49% below the Washington average

At 3,711 vehicles per day, the average monitored road in Kittitas carries 49% less traffic than the state average of 7,322, suggesting less demand on each road - lighter roads for freight, but less passing trade for roadside retail. Network-wide, Kittitas accounts for about 2.2% of Washington's statewide total of vehicle-miles. Kittitas carries more traffic than 55% of counties in Washington.

The average trip takes 34.5 minutes, on par with the state level. Its average travel time of 34.5 minutes is longer than 66% of counties in Washington.

At 31% lower than the state level, the 13.7% congestion ratio signals smoother traffic flow - fewer delays make delivery windows more reliable.

Highway vs. Non-Highway Traffic Analysis

highway traffic icon

Highway Traffic in Kittitas County, Washington

Trafficvehicles per day9,382
Trucks18.1%
Average travel time69.9 min
Congestion ratio19.6%
Drivers’ average age47.4 yrs
Drivers’ average income$93,797

The vast majority of driving in Kittitas County, Washington happens on highways: 86% of all vehicle-miles. The average highway carries 9,382 vehicles per day, 215% more than the average non-highway road in the same area, which carries 2,975 vehicles per day.

With 46% of the road miles (269 miles in 639 segments), highways punch above their length, carrying 2,984,582 vehicle-miles traveled per day (≈1.1 billion per year).

81% of counties in Washington move less traffic on their highways.

Freight-heavy highways

The concentration of trucks on highways (18.1%) is 90% higher than the state average for similar road classifications. Highways here lean toward freight, so highway access is a real asset for logistics operators.

94% of counties in Washington see a lower highway truck share than Kittitas's 18.1%. 78% of counties in Washington see fewer highway trucks per day than Kittitas's roughly 1,694.

non-highway traffic icon

Non-highway Traffic in Kittitas County, Washington

Trafficvehicles per day2,975
Trucks5.5%
Average travel time30.0 min
Congestion ratio12.9%
Drivers’ average age42.9 yrs
Drivers’ average income$83,710

Only a small share of travel in Kittitas County, Washington happens on local roads: 14% of vehicle-miles. A typical local road sees 2,975 vehicles per day.

Spread over 312 miles and 4,925 segments, 54% of the road network, local roads carry a lighter load per mile: 489,241 vehicle-miles traveled per day (≈179 million per year). The truck share on non-highway roads is 5.5%.

Drivers from higher-income areas than 79% of counties in Washington

Non-highway roads carry a truck concentration that's 69% lower than the highway network.

Non-highway congestion (12.9%) runs 34% lower than the state average, pointing to smoother local traffic flow.

Kittitas's average driver income is higher than 79% of counties in Washington. The driver population here skews younger than 66% of counties in Washington.

Time-of-Day & Seasonal Patterns

peak hours icon
Peak Traffic Windows
Weekday peaks:
AM peak 9:00 AM–12:00 PM and PM peak 2:00 PM–5:00 PM, with volumes reaching approximately 93% higher than the daily average.
Weekend traffic:
Weekends are busier than weekdays: volumes run about 18% above weekday levels, which usually points to leisure, tourism or shopping traffic.
seasonal traffic icon
Seasonal Fluctuation
Busy season:
June–August is the high season, with volumes +29% versus the annual average.
Lowest month:
January is the quietest month, with volumes -33% versus the annual average - the usual winter low.

Data Finding: Hourly & Seasonal Patterns

In Kittitas County, Washington, the peak hour concentrates about 8% of the day's traffic, and there is a strong seasonal swing of +29% in high season.

Kittitas County vs. Washington Traffic Comparison

The truck share sets Kittitas County apart: 129% above the Washington average. Its highway truck share is also 90% above.

MetricKittitas CountyWashington averageDifference
Traffic3,7117,322-49.3%
Truck % (Total Traffic)16.3%7.1%+128.9%
Truck % (Highway)18.1%9.5%+89.9%
Avg. Travel Time34.5 min33.2 min+4.2%

How Kittitas County compares

Kittitas County has a higher truck share than any nearby county

Against the 4 nearest areas, Kittitas County runs 7.5 percentage points more truck traffic and carries 30.9% less traffic on a typical road; it has the fourth busiest roads of the five. Freight passes through here that never reaches the areas around it: the truck share is high precisely because the local car traffic is not.

Kittitas County and the 4 nearest county-level areas by centroid distance, with the Washington average for scale.
AreaAverage daily trafficTruck shareDaily vehicle-milesAverage travel timeCongestion ratio
Kittitas County3,71116.3%3,473,82334.5 min13.7%
Yakima County, Washington7,2699.2%5,113,78738.9 min21.7%
Chelan County, Washington6,1566.6%1,717,84237.0 min20.4%
Grant County, Washington3,49711.5%3,043,38133.8 min11.2%
Douglas County, Washington4,5527.8%1,068,26532.7 min14.6%
Washington average7,3227.1%N/A33.2 min19.9%

Kittitas County ranked within Washington

Kittitas County sits in Washington's top three on truck share on highways.

Kittitas County ranked among 39 county-level areas in Washington (1 = highest); measures without data in every county rank a smaller field, down to 33.
MeasureKittitas CountyWashington rank
Traffic volume (AADT)3,711#18 of 39
Highway vehicle-miles per day2,984,582#7 of 33
Truck share on highways18.1%#3 of 33
Highway trucks per day1,694#8 of 33
Average travel time34.5 min#14 of 39
Average driver income$89,588#9 of 39
Average driver age45.2 yrs#26 of 39

Busiest roads in Kittitas County, Washington

The three busiest roads in Kittitas County average 22,883 vehicles a day, 6.2 times the county average of 3,711 across all its monitored roads.

I 90 leads with 32,627 vehicles a day, 5,702 of them trucks (17.5%). No other road comes close: East University, in second place, carries 18,526. It tops the truck ranking too, with the most trucks.

Trips using I 90 are long: a median of 75.2 minutes against 34.5 county-wide, the mark of a through route.

Few trucks use East University: 4.3% of its traffic, under half the county's 16.3%.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1I 90Motorway · 32,627vehicles5,702trucks · 17.5%
Road class
Motorway
Congestion ratio
31.8%
Median trip time
75.2 min
Drivers’ median age
47.9 yrs
Drivers’ average income
$97,950

I 90 is one of the more congested roads here: trips take 32% longer than at free-flow speed, against 14% county-wide.

2East UniversitySecondary road · 18,526vehicles794trucks · 4.3%
Road class
Secondary road
Congestion ratio
32.0%
Median trip time
34.9 min
Drivers’ median age
42.8 yrs
Drivers’ average income
$71,146

Delays build on East University: its congestion ratio of 32% over free-flow time is well above the county's 14%.

3I 82Motorway · 17,495vehicles3,262trucks · 18.6%
Road class
Motorway
Congestion ratio
15.8%
Median trip time
61.0 min
Drivers’ median age
44.3 yrs
Drivers’ average income
$82,240

I 82 carries through traffic: the median trip using it lasts 61.0 minutes, against 34.5 for the county.

4University WaySecondary road · 16,915vehicles735trucks · 4.3%
Road class
Secondary road
Congestion ratio
29.7%
Median trip time
30.4 min
Drivers’ median age
43.3 yrs
Drivers’ average income
$68,996

On its busiest stretch, University Way carries 4.6 times the county average; trucks are 4.3% of it, below the county-wide 16.3%.

5Vantage HighwayMotorway · 16,610vehicles3,215trucks · 19.4%
Road class
Motorway
Congestion ratio
17.8%
Median trip time
67.8 min
Drivers’ median age
46.0 yrs
Drivers’ average income
$93,306

Drivers on Vantage Highway are on long journeys, a median 67.8 minutes against 34.5 county-wide: a through route more than a local street.

Ranked by trucks per day

Cars and light vehiclesTrucks
1I 90Motorway · #1 by traffic32,627vehicles5,702trucks · 17.5%
2I 82Motorway · #3 by traffic17,495vehicles3,262trucks · 18.6%
3Vantage HighwayMotorway · #5 by traffic16,610vehicles3,215trucks · 19.4%
4East UniversitySecondary road · #2 by traffic18,526vehicles794trucks · 4.3%
5University WaySecondary road · #4 by traffic16,915vehicles735trucks · 4.3%
How to read these road counts
  • The first number is AADT, annual average daily traffic: the vehicles passing a point on an average day, both directions combined and trucks included. On a divided highway both carriageways are added together.
  • Traffic changes along a road, with more near interchanges and towns and less in open country. Every figure for a road describes its busiest stretch in the county, so the two rankings show the same numbers for the same road.
  • The second number is the trucks on that stretch, a part of its AADT. The bar splits the AADT into cars and light vehicles (blue) and trucks (amber).
  • See segment-level AADT for any road on TrafficZoom.

Data Sources & Methodology

The data presented on this page is derived from TrafficZoom's proprietary analytics platform, which aggregates and normalizes information from multiple sources, including:

Mobile device location data (anonymized and aggregated)

Road sensor networks and traffic counters

Historical traffic pattern databases

Public traffic count programs published by the

KittitasDepartment of Transportation

Demographic Baseline for O-D Modeling

U.S. Census Bureau
All metrics represent estimates based on statistical modeling and are intended for strategic planning purposes.
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Data current as of:
Q3 2026

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Counties near Kittitas County

The same traffic breakdown for the areas closest to Kittitas County, Washington.

Need segment-level traffic data?

Identify traffic patterns street by street and analyze the exact corridors that matter to your project.